Replace setting unlimited_player_transfer_distance with player_transfer_distance
Organise default settings into categories
Merge pull request #124 from CraigyDavi/organise-default-settings

Organise default settings into categories
Merge remote-tracking branch 'minetest/master'

Conflicts:
	src/environment.cpp
	src/environment.h
	src/server.cpp
	src/serverlist.cpp
fix: returd freeminer good defaults to config
fix: catch MeshUpdateThread exeptions